<template>
  <div class='xtx-goods-page' v-if="goods">
    <div class="container">
      <!-- 面包屑 -->
      <XtxBread>
        <XtxBreadItem to="/">首页</XtxBreadItem>
        <XtxBreadItem  :to="`/category/${goods.categories[1].id}`">{{goods.categories[1].name}}</XtxBreadItem>
        <XtxBreadItem :to="`/category/sub/${goods.categories[0].id}`">{{goods.categories[0].name}}</XtxBreadItem>
        <XtxBreadItem>{{goods.name}}</XtxBreadItem>
      </XtxBread>
      <!-- 商品信息 -->
      <div class="goods-info">
        <div class="media">
          <GoodsImage  :images="goods.mainPictures"/>
          <GoodsSales />
        </div>
        <div class="spec">
           <GoodsName :goods="goods"/>
           <!-- sku组件 -->
           <GoodsSku :goods="goods"  @change="changesku"/>
           <!-- 数量选择组件 -->
           <XtxNumbox label="数量" v-model="num" :max="goods.inventory"/>
          <!-- 按钮组件 -->
          <XtxButton @click="insertCart()" type="primary" style="margin-top:20px">加入购物车</XtxButton>
        </div>
      </div>
      <!-- 商品推荐 -->
      <GoodsRelevant/>
      <!-- 商品详情 -->
      <div class="goods-footer">
        <div class="goods-article">
          <!-- 商品+评价 -->
          <div class="goods-tabs">
            <GoodsTabs />
          </div>
          <!-- 注意事项 -->
          <div class="goods-warn">
            <GoodsWarn />
          </div>
        </div>
        <!-- 24热榜+周热销榜 -->
        <div class="goods-aside">
          <GoodsHot />
          <GoodsHot  :type="2"/>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import GoodsRelevant from './components/goods-relevant'
import {nextTick, ref, watch,provide} from 'vue'
import {findGoods} from '@/api/product'
import { useRoute } from 'vue-router'
import GoodsImage from './components/goods-image.vue'
import GoodsSales from './components/goods-sales.vue'
import GoodsName from './components/goods-name.vue'
import GoodsSku from './components/goods-sku.vue'
import GoodsTabs from './components/goods-tabs.vue'
import GoodsHot from './components/goods-hot.vue'
import GoodsWarn from './components/goods-warn.vue'
import { useStore } from 'vuex'
import Message from '@/components/library/Message'
export default {
  name: 'XtxGoodsPage',
  components: { GoodsRelevant,GoodsImage ,GoodsSales,GoodsName,GoodsSku,GoodsTabs,GoodsHot,GoodsWarn},
  setup(){
      const goods=useGoods()
      const changesku=(sku)=>{
        // console.log(sku);
        if(sku.skuId){
          goods.value.price=sku.price
          goods.value.oldPrice=sku.oldPrice
          goods.value.inventory=sku.inventory
        }
        //记录选择后的sku，可能有数据，可能没有数据{}
        currSku.value=sku
      }

      //提供goods数据给后代组件使用
      provide('goods',goods)
      //选择的数量
      const num=ref(1)


      //加入购物车
      const store=useStore()
      const currSku=ref(null)
      const insertCart=()=>{
        //约定加入购物车字段必须和后端保持一致
        //它们是：id name picture price count skuId attrsText selected nowPrice stock（库存） isEffective（是否为有效商品）
        if(currSku.value && currSku.value.skuId){
          const {skuId,specsText:attrsText,inventory:stock}=currSku.value
          const {id,name,price,mainPictures}=goods.value
          store.dispatch('cart/insertCart',{
            skuId,
            attrsText,
            stock,
            id,
            name,
            price,
            nowPrice:price,
            picture:mainPictures[0],
            selected:true,
            isEffective:true,
            count:num.value,
          }).then(()=>{
            Message({type:'success',text:'添加购物车成功'})
          })
        }else{
            Message({text:'请选择完整'})
        }
      }

      return {goods,changesku,num,insertCart}
  }
}
//获取商品详情
const useGoods=()=>{
    // 解决可能会出现的路由地址商品ID发生变化，但是不会初始化理由
    const goods=ref(null)
    const route=useRoute()
    watch(()=>route.params.id,(newVal)=>{
        if(newVal && `/product/${newVal}`=== route.path){
            findGoods(route.params.id).then(data=>{
            //让商品数据为null然后使用v-if的组件可以重新销毁和创建
            // console.log(data);
            goods.value=null
            nextTick(()=>{
                goods.value=data.result
            })

    })
        }
        },{immediate:true})
    // console.log(goods);

    return goods
}
</script>

<style scoped lang='less'>
.goods-info {
  min-height: 600px;
  background: #fff;
  display: flex;
  .media{
    width: 580px;
    height: 580px;
    padding: 30px 50px;
  }
  .spec{
    flex: 1;
    padding: 30px 30px 30px 0;
  }
}
.goods-footer {
  display: flex;
  margin-top: 20px;
  .goods-article {
    width: 940px;
    margin-right: 20px;
  }
  .goods-aside {
    width: 280px;
    min-height: 1000px;
  }
}
// .goods-tabs {
//   min-height: 600px;
//   background: #fff;
// }
.goods-warn {
  min-height: 600px;
  background: #fff;
  margin-top: 20px;
}
</style>
